Speaker



FIG. 1 is a front, top, right side perspective view of a speaker, showing my new design;

FIG. 2 is a rear, bottom, left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof, left side view being a mirror image thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the figures illustrate the portions of the speaker that form no part of the claimed design. 

CLAIM The ornamental design for a speaker, as shown and described. 